Date: Sat, 19 Jul 2008 05:18:29 +0000 (UTC) From: Jeff Roberson <jeff@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern kern_timeout.c Message-ID: <200807190518.m6J5IgHm024923@repoman.freebsd.org>
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jeff 2008-07-19 05:18:29 UTC
FreeBSD src repository
Modified files:
sys/kern kern_timeout.c
Log:
SVN rev 180608 on 2008-07-19 05:18:29Z by jeff
Fix a race which could result in some timeout buckets being skipped.
- When a tick occurs on a cpu, iterate from cs_softticks until ticks.
The per-cpu tick processing happens asynchronously with the actual
adjustment of the 'ticks' variable. Sometimes the results may
be visible before the local call and sometimes after. Previously this
could cause a one tick window where we didn't evaluate the bucket.
- In softclock fetch curticks before incrementing cc_softticks so we
don't skip insertions which were made for the current time.
Sponsored by: Nokia
Revision Changes Path
1.114 +11 -6 src/sys/kern/kern_timeout.c
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